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DERIVATIVE FINANCIAL INSTRUMENTS (Exchange rate derivative contract) (Details)
$ in Thousands, € in Millions, $ in Billions
Dec. 31, 2020
USD ($)
Dec. 31, 2020
EUR (€)
Dec. 31, 2020
COP ($)
Dec. 31, 2019
USD ($)
Disclosure of detailed information about financial instruments [line items]        
Financial assets, at fair value $ 496,832     $ 239,876
Financial liabilities, at fair value (6,358)     (3,024)
Forward contract        
Disclosure of detailed information about financial instruments [line items]        
Financial liabilities, at fair value (4,263)     (1,811)
Long | Forward contract        
Disclosure of detailed information about financial instruments [line items]        
Notional amount | €   € 53.7    
Long | Euro Member Countries, Euro | Forward contract        
Disclosure of detailed information about financial instruments [line items]        
Financial assets, at fair value 1,572     1,196
Short | Forward contract        
Disclosure of detailed information about financial instruments [line items]        
Notional amount     $ 291.5  
Short | Colombia, Pesos | Forward contract        
Disclosure of detailed information about financial instruments [line items]        
Financial liabilities, at fair value $ (5,835)     $ (3,007)